APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Dawei Lan,Huiwen Zhu,Jianwen Zhang,Chengrui Xie,Fan Wang,Yueying Zheng,Zeyu Guo,Mengxia Xu,Tao Wu
In this research, a novel composite of typical Zr-based metal–organic frameworks (UiO-66) with porous graphitic carbon nitride (g-C 3 N 4 ) was prepared by an in-situ preparation method. The g-C 3 N 4 /UiO-66 nanohybrids (CNU-0.5chieved almost 100 % efficiency in the degradation of RhB (60 mg/L, 100 mL) within 70 min under visible light, which was 6.46 and 10.56 times faster than that of pure g-C 3 N 4 and UiO-66, respectively. The improved photocatalytic properties were attributed to the large surface area, enhanced optical adsorption ability and the creation of heterojunction between g-C 3 N 4 and UiO-66. The formation of the heterojunction structure enhanced the photoelectron transfer efficiency and reduced the recombination of electron/hole pairs. Furthermore, the trapping experiments showed that •O 2 – , h + and •OH were the active species in the photodegradation process, with •O 2 – playing a dominant role. This study offers valuable insights into the preparation of MOF-based photocatalysts with exceptional effectiveness for the removal of contaminants in wastewater treatment.
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2024
·
IF 3.9
Yuhao Yang,Minghui Tan,Hailun Geng,Xiujuan Gao,Yisheng Tan,Qingde Zhang
Oriented designing the microenvironment of catalytic sites is essential for understanding catalytic processes. In this work, EDTA was first grafted in UiO-66 and then chelated Rh to obtain an efficient catalyst for 1-hexene hydroformylation reaction. EDTA not only served as a chelation site for Rh immobilization in UiO-66, but also markedly influenced the structure and properties of Rh/UiO-66. The incorporation of EDTA reduced the micropore content and suppressed the formation of heavy products. Moreover, the grafted EDTA regulated the electronic state of Rh effectively to improve the CO and propene adsorption, thus constructing an appropriate microenvironment for hydroformylation. Therefore, EDTA-modified Rh/U-E catalyst exhibited higher aldehydes yield, TOF and stability than Rh/U without EDTA. The dual role of EDTA in anchoring Rh sites and modulating the microenvironment for hydroformylation provides more prospects for designing customized MOFs-based catalysts.
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2025
·
IF 5.1
Zuyao Fu,Lingfeng Yang,Zhaoyang Ding,Jing Xie
Immobilized enzymes play a crucial role in analytical sensing due to their exceptional stability and considerable commercial importance. In this study, a stable Zr-based metal–organic framework (UiO-66-NH2) was prepared as an immobilization platform for horseradish peroxidase (HRP) through covalent binding. HRP@UiO-66-NH2 retained 75% of its activity after 10 cycles. Subsequently, a colorimetric/fluorometric dual-mode sensing strategy using HRP@UiO-66-NH2 was developed for nitrite detection. HRP@UiO-66-NH2 facilitated the transformation of the non-colored compound 3,3′,5,5′-tetramethylbenzidine (TMB) into its blue oxidized form. When nitrite is added, oxidized TMB (ox-TMB) specifically engaged with nitrite (NO2−) to generate diazotized TMB, leading to a color shift from blue to yellow. Concurrently, NO2− reacted with the amino groups of HRP@UiO-66-NH2, forming diazonium compounds and suppressing the fluorescence of HRP@UiO-66-NH2. The limits of detection were 0.21 μM and 0.19 μM for the colorimetric and fluorometric strategies, respectively. Furthermore, a portable kit for detecting nitrite was created by integrating gelatin with HRP@UiO-66-NH2. The kit could visually identify nitrite from 10–400 μM in colorimetric mode and 0–400 μM in fluorometric mode. This method provides an innovative approach for nitrite sensing, paving the way for new research into multifunctional immobilized enzymes and their potential uses in biochemical sensing applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yu Jiang,Si-Chao Liu,Li-Ping Zhang,Guo-Wei Guan,Yi-Tao Li,Shuang Ni,Run-Yuan Jiang,Su-Tao Zheng,Hao-Ran Liu,Hao-Ling Lan,Qing-Yuan Yang
The photocatalytic reduction of carbon dioxide (CO 2 ) to carbon-based materials is challenging because of its intricate nature and the generation of multiple byproducts. Hence, developing photocatalysts with a high CO 2 -reduction yield and selectivity is critical. In this study, new photocatalysts (U-B-M, M = Co, Ni) were synthesized by incorporating 1,2-benzisothiazolin-3-one (BIT) into NH 2 -UiO-66, to create N, N’-chelating sites via an amine–aldehyde condensation reaction, followed by metal-ion chelation. The introduction of BIT decreased the resistance of the catalyst and enhanced the separation of photogenerated carriers. The catalytic performance of U-B-Ni (rate: 3.10 mmol·g −1 ·h −1 ; selectivity: 97 %) surpasses those most of all previously reported MOF-based photocatalysts. Moreover, U-B-Ni shows high stability and negligible deactivation on catalytic cycling for over 16 h. This study expands the utility of metal–organic frameworks (MOF) in photocatalysis and highlights the importance of amine–aldehyde condensation in MOF modification.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Qiancan Wang,Dongchen Shen,Zhengkai Tu,Song Li
Incorporating metal-organic frameworks (MOFs) especially the ones with protic functional groups into proton exchange membrane (PEM) can effectively improve its proton conductivity . Lanthanide MOFs (Ln-MOFs) have been recognized as more potential candidates exhibiting proton dissociation capability. However, the performance of PEM upon integrating Ln-MOFs in water electrolyzer has yet to be investigated. In this study, Nafion composites with different loadings of lanthanide Ce-UiO-66 were prepared, characterized and tested by comparing with the non-lanthanide Zr-UiO-66. It was revealed that the proton conductivity of Ce-UiO-66/Nafion composite membrane was higher than pristine Nafion and Zr-UiO-66/Nafion membrane, which was attributed to the fact that the Ce-UiO-66 doping contributed to the construction of the hydrogen-bonded network to enhance the proton conductivity. At 3 wt% Ce-UiO-66 doping, the proton conductivity of the composite membrane can reach 124.45 mS/cm, which is significantly improved by 17 % compared with Zr-UiO-66/Nafion. Such a trend is mainly contributed by the lower proton affinity and proton transfer capability of Ce atoms in Ce-UiO-66, and the higher number of water molecules around Ce atoms favors the reduced tortuosity of the proton conduction pathway in membranes. Single electrolytic cell tests demonstrated the enhancement of electrolysis efficiency upon Ce-UiO-66 doping was improved from 58.77 % to 65.37 % at a current density of 2 A cm −2 .
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xingyu Zhang,Lin Chen,Longjie Jiang,Liang Zhu,Chuqing Cao,Wei Zhang,Linting Zhao,Jiaqi Xu,Han Liu
In the advent of the new energy era, the global demand for lithium is increasing rapidly. The recovery of Li + and Co 2+ from the leachate of high-quality spent lithium-ion batteries (LIBs) offers significant economic and environmental benefits. This study proposes a TFC-ON-MOF membrane prepared through a combination of in situ growth and interfacial polymerization (IP) for the recovery of Co 2+ and Li + from battery leachate. Operated in an electrodialysis (ED) system, the experimental results demonstrated that the optimum Li + membrane flux was observed to reach 1.02 μmol cm −2 min −1 at 7.5 mA cm −2 , with the selectivity remaining at 19.84, which exemplifies well-separation and permeation performance. Following several operational cycles, the separation performance remained stable, and the membrane exhibited enhanced fouling resistance relative to commercial monovalent selective cation exchange membranes (CSO). The composite membrane features sub-nanometer windows and nanometer-sized cavities, enabling selective permeation of Li + while simultaneously sequestering Co 2+ . The inclusion of auxiliary permeation groups (PSS) also enhances overall permeation performance and selectivity. The findings contribute to the design of composite metal–organic frameworks and provide a novel approach for the selective separation of heavy metal ions from spent lithium batteries, thereby promoting the efficient recycling of valuable metal resources.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Fan Yang,Hui-Hui Xie,Fan Du,Xiaomin Hou,Si-Fu Tang
Enzyme immobilization is an effective strategy for achieving efficient and sustainable enzyme catalysis. As a kind of promising enzyme-loading materials, the systematic research on zirconium based metal organic frameworks (Zr-MOFs) about immobilization performance at molecular level is still in its initial stage. In this work, UiO-66 was functionalized with various groups (-H, -NH 2 , -COOH, -OH, -2OH) for the immobilization of cytochrome c (Cyt c) and antioxidant enzyme catalase (CAT). Then the effects of surface-functionalized UiO-66 derivatives on the loading efficiency, enzyme stability and catalysis kinetics were systematically investigated. In addition, the affinity constants of Cyt c and CAT towards UiO-66-series MOFs carriers were also compared. The results have shown that hydroxyl group functionalized UiO-66 represents the highest enzyme loading capacity, enhanced activity and improved stability for Cyt c and CAT possibly due to high surface area and suitable microenvironments as well as enhanced affinity towards the enzymes provided by the introduction of a single hydroxyl group. Our research would foresee immense potential of MOFs in engineering biocatalysts.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Panpan Liu,Qinglei Xing,Runqing Huang,Peng Bai,Jiafei Lyu
This study explores the incorporation of three Zr-based MOFs with varying pore structures (UiO-66, NU-906, and NU-1008) into a polyphenylsulfone (PPSU) matrix for dye and salt separation, highlighting that UiO-66/PPSU membrane exhibits superior permeability and separation performance. To enhance the compatibility of the MOF with the matrix and improve the antifouling performance, hydrophilic diethylenetriamine was grafted onto UiO-66. The strengthened hydrogen bonding between DETA-UiO-66 and PPSU improved its dispersibility in the polymer matrix and increased the mechanical strength of the MMMs. Moreover, the incorporation of hydrophilic DETA-UiO-66 nanoparticles enhanced the pore structures and hydrophilicity of the DETA-UiO-66/PPSU membranes, enabling them to exhibit higher permeability and antifouling performance. The 1.0wt%DETA-UiO-66/PPSU membrane exhibited a substantial increase in water flux to 16.52 LMH·bar −1 , threefold and double higher than the pure PPSU membrane and UiO-66/PPSU membrane. Meanwhile, high rejection rates of 99.3% for reactive orange 16, 99.6% for brilliant blue G, and 99.7% for rose Bengal were demonstrated with low NaCl retention rate of 7.69% at a high salt concentration of 5000 mg/L, achieving a high salt/dye separation factor of 184.6 under the size sieving and the Donnan exclusion mechanisms. Moreover, integrating DETA-UiO-66 significantly improved the antifouling performance with the flux recovery rate increased from 71.6% to 95.2% and the irreversible fouling ratio decreased to 4.8%. DETA-UiO-66/PPSU membrane also exhibited excellent stability where the mechanical integrity and separation performance were maintained in the 100-hour dye/salt separation process. This research highlights the promising application of DETA-UiO-66 in the fabrication of advanced mixed matrix nanofiltration membranes and offers valuable insights into the integration of various modified hydrophilic MOFs for the design of efficient water treatment membranes.
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Yang Shen,Fatoye Sawyerr,Lunbo Xu,Shusu Shen,Xiaoji Zhou
The preparation of modified membranes utilizing the UiO-66 framework for wastewater filtration is regarded as one of the most promising approaches to wastewater treatment, owing to its high efficiency and cost-effectiveness. In this study, a post-modified MOF, UiO-66-RSA, was synthesized via the condensation reaction of UiO-66-NH 2 and 2,4-dihydroxybenzaldehyde. PVDF mixed matrix membranes (MMMs) were fabricated for the first time by mixing UiO-66-RSA into PVDF using the non-solvent induced phase separation (NIPS) method. Compared to pure PVDF membranes, the newly developed membrane, M4, demonstrated enhanced compatibility and superior mechanical strength. In dyeing wastewater treatment applications, M4 showed excellent separation efficiency for dye and heavy metal mixed wastewater, achieving rejection rates exceeding 90 %. Additionally, it maintained a high flux recovery rate (FRR > 90 %) and rejection rate (Rejection > 90 %) after six filtration cycles of dye-containing wastewater, indicating strong recyclability. These findings suggest that MMMs embedded with UiO-66-RSA hold significant promise for dyeing wastewater treatment.
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 10
·期 1
·e202405135
·
IF 1.9
Zhanmeng Liu,Mang Lu,Haitao Gan,Jiacheng Li,Guiqing Gao,Manqing Xu,Xianglian Wang
Graphical OTC molecules diffuse to the surface of FU3 to cause film diffusion, and continue to diffuse and fill into large-, medium- and micro-pores of FU3. FU3 can be π─π conjugated and cation─π bonded with the benzene rings and amino groups of OTC. The charged surface of FU3 leads to a strong electrostatic effect in the adsorption process. The doping of Fe 3 O 4 produces structural defects to promote the OTC adsorption. As one of the most stable metal-organic frame materials (MOFs), UiO-66 has attracted extensive attention in the adsorption field. However, the application of UiO-66 is still constrained by the weak electron-hole charge separation capability and the low accessibility of micropores. In this study, the mesoporous defects of UiO-66 were constructed with acetic acid and doped with Fe 3 O 4 to prepare magnetically recyclable Fe 3 O 4 @UiO-66. The doping of Fe 3 O 4 resulted in the formation of denatured mesoporous defects in UiO-66, which was conducive to adsorption oxytetracycline (OTC) in water. The crystal structure and physicochemical characteristics of Fe 3 O 4 @UiO-66 were examined. By using the static adsorption technique, the adsorption characteristics and mechanism of OTC on Fe 3 O 4 @UiO-66 were investigated. The results reveal that Fe 3 O 4 @UiO-66 has an adsorption capacity of 210 mg g −1 and an OTC removal ratio of 84.0%. The pseudo-second-order kinetics, Elovich, and Langmuir isothermal adsorption models were all applicable to the adsorption process. The adsorption process increased entropy and was an endothermic reaction. Solution pH has a little effect on the adsorption performance. This study provides the possibility of one-step synthesis of MOFs that can efficiently adsorb tetracycline antibiotics in water with low cost and excellent recyclability and reusablity.
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Honghuan Yin,Huaiwen Wang,Dongai Wang,Miaomiao Shi,Xi Xu,Jiaqi Yang
Developing low-cost and stable adsorbent is urgent and attractive to remove hazardous dye from water. In this study, zirconium based metal-organic framework (NH 2 -UiO-66) was grown on waste wool fibers and the fabricated composite adsorbent (NH 2 -UiO-66/wool) was used to remove anionic dye methyl orange (MO). After characterizing the adsorbents, we determined the effect of pH and initial concentration of MO on adsorption performance. Moreover, adsorption kinetics and isotherms were conducted to reveal the adsorption mechanism. The results showed that NH 2 -UiO-66/wool achieved the highest adsorption capacity at natural pH with the maximum adsorption of 61.0 mg/g adsorbent, which is higher than most biomass based adsorbents. Moreover, NH 2 -UiO-66/wool enabled a broad range of pH (3−11) and initial concentration of MO (10–50 mg/L). Adsorption kinetics and isotherms of NH 2 -UiO-66/wool fitted well with pseudo-second-order model and Langmuir mode, respectively. NH 2 -UiO-66/wool presented 40.3 times higher of kinetics constant than that of original wool in the presence of initial MO concentration of 10 mg/L due to the positive nature of NH 2 -UiO-66. Ultimately, NH 2 -UiO-66/wool presented excellent regeneration ability with 500 mg/L NaCl solution and regeneration efficiency remained 98% after 10 cycles. Overall, this work may provide new insights into the development of MOFs/wool adsorbents for enhanced dye removal.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Shenyi Tang,Chenglian Luo,Zhi Wang,Xinlei Liu
A defect-free and stable metal–organic framework (MOF) membrane is a promising candidate for the separation of methanol/methyl tertiary butyl ether (MeOH/MTBE) mixtures. In this work, a structural-integrity and low-thickness (∼400 nm) UiO-66 membrane was fabricated by regulating the metal ion/ligand molar ratio in the synthesis solution and optimizing the preparation process using the secondary growth method with safer and more environment-friendly Zr(n-OPr)4 metal source. Based on the effective pore size and inherent amphiphilic structure of UiO-66, the membrane exhibits exceptional pervaporation (PV) performance. For the separation of MeOH/MTBE (5:95 wt/wt %) mixtures, the membrane displays an outstanding separation performance with an average separation factor of 2.23 × 104 and an average total flux of 3.61 kg·m–2·h–1 at 40 °C, which is superior to most membranes reported for the PV separation of MeOH/MTBE mixtures. In addition, a 72 h PV process was used to further confirm the structural stability of the membrane.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）